fulltext.study @t Gmail

FeN particles confined inside CNT for light olefin synthesis from syngas: Effects of Mn and K additives

Paper ID Volume ID Publish Year Pages File Format Full-Text
55491 47055 2012 7 PDF Available
Title
FeN particles confined inside CNT for light olefin synthesis from syngas: Effects of Mn and K additives
Abstract

The effects of manganese and potassium on the structural and morphological properties, phase compositions and CO adsorption behavior of the CNT-confined FeN catalyst were investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM), 57Fe Mössbauer effect spectroscopy (MES) and CO temperature-programmed desorption (TPD). The results suggested that the presence of manganese helps retain nitrogen in cubic FeCxN1−x and facilitates CO adsorption. The selectivity to C2C4 light olefins is enhanced over Mn(1.0 wt%)/FeN/CNT although the activity decreases within the loading range of 0.5–2.0 wt% for Mn. Although further promotion with K could improve the activity slightly, the selectivity to light olefins decreases. At the same time, the addition of potassium enhanced the water gas shift activity and shifted the selectivity to heavy hydrocarbons (C5+), similar to the conventional reduced iron catalysts.

Graphical abstractThe presence of Mn additive in FeN/CNT enhances the selectivity to C2C4 light olefins although the activity decreases in syngas conversion. However, the addition of K to Mn(1.0 wt%)/FeN/CNT could not further improve the selectivity to light olefins.Figure optionsDownload full-size imageDownload high-quality image (361 K)Download as PowerPoint slideHighlights► The effects of Mn and K as additives on CNT-confined FeN catalysts have been studied in light olefin synthesis from syngas. ► The presence of Mn helps retain nitrogen in cubic FeCxN1−x during reaction and facilitates CO adsorption. ► The selectivity to C2C4 light olefins increases although the activity decreases within the loading range of 0.5–2.0 wt% for Mn. ► Further promotion with K could improve the activity slightly, the selectivity to light olefins decreases.

Keywords
CO hydrogenation; Carbon nanotubes; Confined iron nitride nanoparticles; Mn promotion; K promotion
First Page Preview
FeN particles confined inside CNT for light olefin synthesis from syngas: Effects of Mn and K additives
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 186, Issue 1, 1 June 2012, Pages 121–127
Authors
, , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us